RNA viruses and DNA viruses, DNA viruses have the advantage from an evolutionary point of view. Because the virus itself cannot reproduce and must depend on the host and survive in the cell, RNA viruses change so quickly and are so lethal, but many powerful RNA viruses die with the host, which causes the virus to die as well. DNA viruses have a greater clinical survival time and survival advantage. The new coronaviruses that are currently prevalent are RNA viruses, and hepatitis B viruses, among others, are DNA viruses that cause long-term chronic inflammation and disease in humans. The prevention and treatment of the virus should be carried out under the guidance of professionals, and the new coronavirus should be detected, isolated and treated as early as possible.